Stop Service

To discontinue residential service, you can fill out a disconnect notice at our office or bring in, fax or mail a signed letter requesting the disconnect and directing NBU where to send your final bill. If you have any questions, call Customer Service at (830) 629-8400, (830) 606-2074 (San Antonio metro) or send e-mail to You can send a fax to NBU at (830) 629-2119